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Kaplan-Meier survival curves illustrating the overall survival (OS) in breast cancer patients with the ABCG2 G34A polymorphism. (a) Patients with anthracycline-based chemotherapy (n = 761); (b) patients with ER positive status after anthracycline-based chemotherapy (n = 444); (c) patients with PR positive status after anthracycline-based chemotherapy (n = 418). Log-rank P values were indicated.
